Why roulette is better than land banking

Dear Mr. Tan,

Read this article
http://www.learnmoney.co.uk/advice/advice-87.html

Land Banking Companies
Why the majority of them are (legal) scams

UK land sold by Land Banking firms have about a 1% chance of receiving planning permission over the next 20+ years.

That means you have a 99%+ chance of owning a piece of land that is almost completely worthless.(the land is typically marked up by 1500% when you buy it and resale on the open market without planning permission is almost impossible)

In roulette you  have a  2.7%  chance of winning  if you put all your money on a single roulette number.
You will also find out immediately  that you have lost all your money and should learn very quickly not to gamble. If you win Roulette  will also give 35 times payout not the two to three times offered by the land banking companies.

If I were to sell a  single roulette number with a 3 to 1 payout  for winning as an amazing investment opportunity I am sure I would be shut down and probably put in Jail.

Can anyone explain why are Land Banking companies not subject to the same scrutiny ?